Symfony version(s) affected: 4.1.1

Description
The usage section of help command output should not print command name as it is not supported.

How to reproduce

• Create a simple single command application using this example from documentation.
• Save it to ./bin/test.php file.
• Run the script with some argument (./bin/test.php foo) and make sure it works as expected.
• Run the script as it suggested by help command (./bin/test.php echo foo).
• The following error should appear: Too many arguments, expected arguments "foo".